Poly(ureaurethane)s, articles and coatings prepared therefrom and methods of making the same

摘要

The present invention provides poly(ureaurethane)s including a reaction product of components comprising: (a) at least one isocyanate functional ureaurethane prepolymer comprising the reaction product of: (1) at least one isocyanate functional urethane prepolymer comprising the reaction product of: (i) a first amount of at least one polyisocyanate; and (ii) a first amount of at least one branched polyol; and (2) water, to form an isocyanate functional ureaurethane prepolymer; and (b) a second amount of at least one polyisocyanate and a second amount of at least one branched polyol; compositions, coatings and articles made therefrom and methods of making the same.

主权项

1. A poly(ureaurethane) consisting of a reaction product of components, wherein the components used to prepare the reaction product consist of:
(a) at least one isocyanate functional ureaurethane prepolymer consisting of the reaction product of:
(1) at least one isocyanate functional urethane prepolymer consisting of the reaction product of:
(i) a first amount of at least one polyisocyanate; and(ii) a first amount of at least one branched polyol selected from the group consisting of glycerol, glycerin, tetramethylolmethane, trimethylolethane, trimethylolpropane, erythritol, pentaerythritol, dipentaerythritol, tripentaerythritol, sorbitan, and mixtures thereof;(2) water, wherein the equivalent ratio of isocyanate functional groups of the isocyanate functional urethane prepolymer to water ranges from 1:0.05 to 1:0.5, wherein urea linkages or units are formed by reacting the isocyanate functional groups of the isocyanate functional urethane prepolymer with water to form an isocyanate functional ureaurethane prepolymer; and (b) a second amount of at least one polyisocyanate and a second amount of at least one branched polyol, and (c) at least one aliphatic diol having 2 to 18 carbon atoms,
wherein the components comprise less than about 5 weight percent of polyester polyol and less than about 5 weight percent of polyether polyolwherein urea linkages or units are formed by reacting the isocyanate functional groups of the isocyanate functional urethane prepolymer with water.